It’s great having several kids, you get to exhibit several different parenting styles. It’s not a matter of observing the different outcomes only, but also a requirement.
You see different people are just that, different, this also applies to kids, it’s the whole nature vs nurture thing.
It seems to me that nature has a great deal to do with it, you can change some behaviours with lessons and discipline, but some things are just ingrained.
Kids will challenge you, they’ll test you, they’ll teach you stuff you never knew.